61775413 has 4 divisors (see below), whose sum is σ = 70600480. Its totient is φ = 52950348.

The previous prime is 61775411. The next prime is 61775431. The reversal of 61775413 is 31457716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61775413 - 2¹ = 61775411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61775411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4412523 + ... + 4412536.

It is an arithmetic number, because the mean of its divisors is an integer number (17650120).

Almost surely, 2^61775413 is an apocalyptic number.

It is an amenable number.

61775413 is a deficient number, since it is larger than the sum of its proper divisors (8825067).

61775413 is an equidigital number, since it uses as much as digits as its factorization.

61775413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825066.

The product of its digits is 17640, while the sum is 34.

The square root of 61775413 is about 7859.7336468865. The cubic root of 61775413 is about 395.3106843735.

The spelling of 61775413 in words is "sixty-one million, seven hundred seventy-five thousand, four hundred thirteen".